wish: transparent remove.duplicates on non-duplicated sp objects

Hi and thanks to all R developers and helpers,>

I'm writing a few words of code to perform automatic ordinary krigings for a number of dates. In my dataset some duplicated locations exist (at the resolution of the coordinates I use) for some days. Thus, I run the straight-forward solution of using the "remove.duplicates" and the process works well.>

The problem is when the loop applies "remove.duplicates" for an object with no duplicates. The output of this command is not the original object but an empty one:>

str(Pst)>

Formal class 'SpatialPointsDataFrame' [package "sp"] with 5 slots>
 ..@ data       :'data.frame':	177 obs. of  1 variable:>
 .. ..$ PCP: num [1:177] 0 0 0 0 0 0 1.2 0.6 0 0 ...>
 ..@ coords.nrs : num(0) >
 ..@ coords     : num [1:177, 1:2] 518 494 490 489 490 ...>
 .. ..- attr(*, "dimnames")=List of 2>
 .. .. ..$ : chr [1:177] "B001" "B007" "B013" "B014" ...>
 .. .. ..$ : chr [1:2] "X(km)" "Y(km)">
 ..@ bbox       : num [1:2, 1:2] 345 4280 612 4438>
 .. ..- attr(*, "dimnames")=List of 2>
 .. .. ..$ : chr [1:2] "X(km)" "Y(km)">
 .. .. ..$ : chr [1:2] "min" "max">
 ..@ proj4string:Formal class 'CRS' [package "sp"] with 1 slots>
 .. .. ..@ projargs: chr "+proj=utm +zone=31 +units=km">

remove.duplicates(Pst)>

[1] coordinates PCP        >
<0 rows> (or 0-length row.names)>
Warning messages:>
1: In min(x) : no non-missing arguments to min; returning Inf>
2: In max(x) : no non-missing arguments to max; returning -Inf>
3: In min(x) : no non-missing arguments to min; returning Inf>
4: In max(x) : no non-missing arguments to max; returning -Inf>

Wouldn't it be nice if "remove.duplicates" left objects with no duplicates unmodified?>

Thanks,>

V?ctor.>
-->
-------------------------------------------------------------------->
V?ctor Homar Santaner>
Grup de Meteorologia			Departament de F?sica>
Edif. Mateu Orfila                      Tel: +34 971 17 2505>
Universitat de les Illes Balears        Fax: +34 971 17 3426>
07122 Palma de Mallorca (SPAIN)         Email: Victor.Homar at uib.es>

               Knowledge is contagious. Infect truth.>
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